barack obama is the great extricate her. his role is to get americans out of conflicts, not get them into new ones. cruel and unforgiving assessment. >> thank you, aaron. [applause]>> we will take it from your rebuttal. we will now have a three-minute rebuttal from liana. we will leave it to josh to do that rebuttal. >> i will say couple of things quickly. first, with all due respect to the presidency, it is not up to him or the president what history provides. history presents challenges, whether he wants to do the great indicator -- it is not up to him. history will operate the way it does. we will assess the various challenges on their own. secondly, i understand the problem of knowledge and ignorance and personal and political life and diplomatic life. we all operate with the various levels of knowledge. we will never have the kind of clarity that some people want us to have before we undertake historical action. we can argue about levels of clarity that would be necessary and what we would have to know and what we would